Orioles Acquire Jackson Kowar

The Orioles have acquired right-hander Jackson Kowar from the Twins in exchange for cash considerations, according to Roch Kubatko of MASN. The team placed fellow right-hander Colin Selby on the 60-day injured list with right shoulder inflammation in a corresponding move.

Kowar was designated for assignment by the Twins on Thursday. Prior to that, he had only recently been claimed off waivers from the Mariners. Kowar spent most of 2025 shuttling back and forth from Triple-A, though he did make 15 appearances (17 innings) at the big-league level. He had a 4.24 ERA in that sample, along with a 21.1% strikeout rate and a 9.9% walk rate. Kowar’s expected stats were more pessimistic, with his 5.15 xERA and 5.84 FIP suggesting he benefited from good luck.

Since his debut in 2021, Kowar has thrown 91 innings over 54 appearances (eight starts) between the Royals and Mariners. Unfortunately, he owns an unsightly 8.21 ERA in that time, with his expected numbers putting him in the upper-5.00’s. His 20.3% strikeout rate is serviceable, but the righty has struggled with control to the tune of a 13.1% career walk rate. He also struggles to keep the ball in the yard, having allowed 19 home runs throughout his career (1.88 HR/9). Injuries certainly haven’t helped his performance. In March 2024, he suffered a torn ulnar collateral ligament and underwent Tommy John surgery while with the Mariners. Though he returned in May 2025, he missed the last month and a half of the season with a right shoulder impingement.

Kowar makes for an interesting low-cost flier for the Orioles’ bullpen mix. Statcast graded his fastball velocity in the 90th percentile and valued the pitch at two runs above average in 2025. Unsurprisingly, Kowar leaned on the pitch 57.7% of the time. The key for him will be improving his location and avoiding hard contact, as hitters slugged .476 against the pitch in 2025. His mid-80s slider was his second most-used pitch could be a plus pitch going forward. While it had a -1 run value this year, Kowar struck out 39.1% of hitters on that pitch. He has less than three years of service time and is out of options, so the club would need to pass him through waivers if he doesn’t make the roster.

Recent reports indicated that Selby was dealing with shoulder inflammation. He’ll now open the season on the injured list, though the timing of the placement makes it possible for him to return in mid-April. Selby was acquired from the Royals in a July 2024 cash trade. He has thrown 18 big-league innings for Baltimore since then, 14 of them coming in 2025. In that small sample, he impressed with a 3.21 ERA and a microscopic 3.3% walk rate (which was admittedly an outlier from his career numbers). Selby’s sinker, slider, and knuckle curve all graded slightly above average in terms of run value. He has less than a year of service time and is also out of options, so he’ll need to perform well upon his return or else risk being placed on outright waivers.

Photo courtesy of Dennis Lee, Imagn Images